Wildflowers Found in Oregon

Common St. John's Wort - (Klamathweed)

Hypericum perforatum - Common, all summer, perennial, 1-4 ft. Stems erect from taproot. Shorter axillary stems without flowers 1-4 in. tall. Leaves opposite, 1/2-1 in., linear to oblong, with edges rolled under, with black dots especially on underside. Inflorescence consists of 25-75 flowers per stem. Flowers with 5 sepals, lance-shaped, sharply pointed with many black and green dots; petals 5, oblong, reflexed, yellow with many black dots, with many long stamens. Grows in disturbed places, roadsides, fields, pastures, below 5000 st. Toxic to livestock. A noxious weed. Nonnative.